This is a 10.5mm shaft from OK healing. The joint is Uni-Loc. I'm selling it because I've used it a few times since I bought it and it's been sitting in my cue case. Because it's a thin shaft, it's easy to aim and I don't think there's any deflection. If you want to try a thin shaft, or are looking for a bargain, why not give it a try? By the way, I was able to adjust quite well with this shaft, so I bought a 10.5mm Synergy and use it regularly. Thank you.